On this day in 1968, during the Vietnam War, student protesters at Columbia University in New York City took over administration buildings and shut down the university.
On this day in 1985, Coca-Cola changed its formula and released New Coke. The response was overwhelmingly negative, and the original formula was back on the market in less than three months.
And on this day in 1993, Eritreans voted overwhelmingly for independence from Ethiopia in a United Nations-monitored referendum.